Question 222

2, 10, 42, 170, ?, 2730, 10922

Solution

Each term in the series is 4 times the previous term plus 2.

For example, 10 = 4*2 +2

42 = 4*10 + 2

170 = 4*42 + 2 and so on.

So, the term to be replaced in place of the question mark equals 4*170 + 2 = 682

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